php increment variable value with 1 when submit

Question

Hi I am new in php and started learning. I am trying to increment variable value with 1 when submit button is pressed.

My Code:

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Answer 1

var_dump($IsPost = !strcasecmp($_SERVER['REQUEST_METHOD'], 'POST'));

^ tells you if it's a post.

echo ++$i;

^ increments $I and then prints $I

echo $i++;

^ prints $I and then increments $I

empty($_POST['submit']); // or isset($_POST['submit']);

^ tells you if ['submit'] exists in $_POST without notices.